RYR1 and multiminicore myopathy: Mutations in the RYR1 gene are linked to several distinct skeletal muscle disorders, i.e., malignant hyperthermia susceptibility (MHS), central core disease (CCD), exertional rhabdomyolysis, King Denborough syndrome, late-onset axial myopathy, and congenital “core-rod myopathy,” all mainly with an autosomal dominant inheritance, whereas it is linked to subgroups of multiminicore disease (MMD), congenital fiber type disproportion, and centronuclear myopathy with an autosomal recessive inheritance [1].